1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f30a886cde6cca61fa4e4ca4c38aee1b29922734384222b3a5c86a2b20f096d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78ff8b41-9207-4ee9-b542-8039814a5864.json and https://artists.proofprofile.net/proofs/artist/78ff8b41-9207-4ee9-b542-8039814a5864.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cerimonial Court Music in XVII and XVIII Centuries
Sonate for Oboe, Bassoon and Continuo - Georg Philipp Telemann (1681 - 1767)
Besozzi: Sonate per 2 Oboi, 2 Corni e Fagotto
Caldara: Costanza Vince Il Rigore (La) / La Lode Premiata
Baron: Oboe Sonata in D Minor / Duet for Lute and Flute in G Major / Concerto for Recorder and Lute in D Minor
Duetto for Lute and Flute in G Major: III. Presto
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905676f1d743e2934b64560e0d47d2d3bc9ef947ceeade1d5a22013b1f76eec2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320904497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb2ec5d5d22852b89932fc677299b307b5d779f1f6a99cbc6333d3fd86bf5c7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320904504.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601355b16f9b574d20a6ca72f1fa58ca32655fd12cd63861339379d875f72deb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320904505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6678c4c5a46d9cddd9ab905e95c9682bfe09c1ee516ea38b4715c5db8f53635. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320904506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa886c82dbdb123e409849d00804f07a55fdda4423a2053746d525f145fab56. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320904507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e083b22d5cb848b8794cca169cac4004be7bd070d1741d1a3e941eb87fdef0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320904508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646fa9b23ffe26428a12efa37add2ea81c99d7210005dc6a61504092ba581d4a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320904510.
Fasch: Concertos for 2 Oboes / Ouverture (Suite) in G Major
Califano: Triosonate per due oboi, fagotto e B.C.